中国物理B ›› 2020, Vol. 29 ›› Issue (4): 40305-040305.doi: 10.1088/1674-1056/ab7805

所属专题: SPECIAL TOPIC — Optical field manipulation

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Creation of topological vortices using Pancharatnam-Berry phase liquid crystal holographic plates

Xuyue Guo(郭旭岳), Jinzhan Zhong(钟进展), Peng Li(李鹏), Bingyan Wei(魏冰妍), Sheng Liu(刘圣), Jianlin Zhao(赵建林)   

  1. MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
  • 收稿日期:2020-01-07 修回日期:2020-02-09 出版日期:2020-04-05 发布日期:2020-04-05
  • 通讯作者: Peng Li, Bingyan Wei E-mail:pengli@nwpu.edu.cn;wbyxz@nwpu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11634010, 91850118, 11774289, 61675168, and 11804277), the National Key Research and Development Program of China (Grant No. 2017YFA0303800), the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1630125), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 3102018zy036, 3102019JC008, and 310201911cx022).

Creation of topological vortices using Pancharatnam-Berry phase liquid crystal holographic plates

Xuyue Guo(郭旭岳), Jinzhan Zhong(钟进展), Peng Li(李鹏), Bingyan Wei(魏冰妍), Sheng Liu(刘圣), Jianlin Zhao(赵建林)   

  1. MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
  • Received:2020-01-07 Revised:2020-02-09 Online:2020-04-05 Published:2020-04-05
  • Contact: Peng Li, Bingyan Wei E-mail:pengli@nwpu.edu.cn;wbyxz@nwpu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11634010, 91850118, 11774289, 61675168, and 11804277), the National Key Research and Development Program of China (Grant No. 2017YFA0303800), the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1630125), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 3102018zy036, 3102019JC008, and 310201911cx022).

摘要: Recently, physical fields with topological configurations are evoking increasing attention due to their fascinating structures both in fundamental researches and practical applications. Therein, topological light fields, because of their unique opportunity of combining experimental and analytical studies, are attracting more interest. Here, based on the Pancharatnam-Berry (PB) phase, we report the creation of Hopf linked and Trefoil knotted optical vortices by using phase-only encoded liquid crystal (LC) holographic plates. Utilizing scanning measurement and the digital holographic interference method, we accurately locate the vortex singularities and map these topological nodal lines in three-dimensions. Compared with the common methods realized by the spatial light modulator (SLM), the phase-only LC plate is more efficient. Meanwhile, the smaller pixel size of the LC element reduces the imperfection induced by optical misalignment and pixellation. Moreover, we analyze the influence of the incident beam size on the topological configuration.

关键词: topological vortices, Pancharatnam-Berry phase, liquid crystal, phase singularity, hologram

Abstract: Recently, physical fields with topological configurations are evoking increasing attention due to their fascinating structures both in fundamental researches and practical applications. Therein, topological light fields, because of their unique opportunity of combining experimental and analytical studies, are attracting more interest. Here, based on the Pancharatnam-Berry (PB) phase, we report the creation of Hopf linked and Trefoil knotted optical vortices by using phase-only encoded liquid crystal (LC) holographic plates. Utilizing scanning measurement and the digital holographic interference method, we accurately locate the vortex singularities and map these topological nodal lines in three-dimensions. Compared with the common methods realized by the spatial light modulator (SLM), the phase-only LC plate is more efficient. Meanwhile, the smaller pixel size of the LC element reduces the imperfection induced by optical misalignment and pixellation. Moreover, we analyze the influence of the incident beam size on the topological configuration.

Key words: topological vortices, Pancharatnam-Berry phase, liquid crystal, phase singularity, hologram

中图分类号:  (Phases: geometric; dynamic or topological)

  • 03.65.Vf
42.79.Hp (Optical processors, correlators, and modulators) 42.40.Eq (Holographic optical elements; holographic gratings) 42.70.Df (Liquid crystals)